Air ionizer



FIG. 1 is a front, right side perspective view of an air ionizer showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof, the opposite being a mirror image of the shown;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a bottom plan view thereof.

The elements shown in broken-lines in FIGS. 1, 2, 3 and 6, are not part of the claimed design. 

The ornamental design for an air ionizer, as shown and described. 